The Winden Caves (Windener Höhlen) are an intricate system of caves adjacent to the Winden Nuclear Power Plant and the bunker.
They contain the wormhole that allows for time travel, which is located right underneath the bunker. The cave's main entrance is located in the forest and the other known entrance is near the Winden Nuclear Power Plant. These were once connected, but this connection was sealed with a metal door, as ordered by Claudia Tiedemann in 1986.
History[]
The cave map shows that the caves were surveyed and mapped from the late 1800s to the 1920s by individuals named Waldron, Sandberg, Lenzinger and Blättermann, among others.